The effectiveness of brooding of eggs of crosses lohmann of different selection

Abstract

The technological process of brooding is closely related to the biological usefulness of eggs, the mode of their storage before brooding, the technical characteristics and level of operation of brooders and auxiliary equipment, the brooding technique and the qualification of service personnel. It is constantly work to improve the quality of hatching eggs and bring the brooding environments closer to the natural optimum. Many factors including genetic factors play an important role in the quality of the hatchable egg. The purpose of the research was to carry out a comparative analysis of the technology and effectiveness of brooding of eggs of crosses of Lomann of different selection: Lohmann White, Lohmann Brown, Lohmann Sandy in a poultry farm in the Sverdlovsk region. It has been found as a result of the conducted research that the first biological control of the cross Lohmann White was superior to the cross Lohmann Brown and Lohmann Sandy. After the second biological control a large number of frozen embryos have been detected in cross Lohmann White – 7042 pieces. Crosses Lohmann Brown and Lohmann Sandy were almost identical in terms of biological control after brooding. The large number of embryos died in the group of eggs of the cross Lohmann White – 14.03 % of eggs were unfertilized, the blood-ring was set at 1,8 %; frozen – 16,3 %, weak – 2,8 %, crippled – 4,3 %, suffocated – 7,2 % compared to other crosses, this was more than 2–4 times, depending on the cause. When calculating the effectiveness of brooding the leader was cross Lohmann White where yield of chickens was 80,25 % and the cost of chickens accepted for rearing was 254 242,5 rubles. In the crosses Lohmann Brown and Lohmann Sandy the cost of chickens accepted for rearing were 112 815 rubles and 116 902,5 rubles, respectively. Thus, the advantage of the hatchable egg of the cross Lohmann White has been established.